/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.trino.metadata;

import io.trino.spi.function.LanguageFunctionEngine;

import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;

import static java.util.Locale.ENGLISH;

public class LanguageFunctionEngineManager
{
    private final Map<String, LanguageFunctionEngine> languageFunctionEngines = new ConcurrentHashMap<>();

    public Optional<LanguageFunctionEngine> getLanguageFunctionEngine(String language)
    {
        return Optional.ofNullable(languageFunctionEngines.get(language.toUpperCase(ENGLISH)));
    }

    public void addLanguageFunctionEngine(LanguageFunctionEngine engine)
    {
        if (languageFunctionEngines.putIfAbsent(engine.getLanguage().toUpperCase(ENGLISH), engine) != null) {
            throw new IllegalArgumentException("Language function engine for language %s is already registered".formatted(engine.getLanguage()));
        }
    }
}
